we have some dilemma between the panasonic uj-840, uj-841 and the uj 846-b that we need to install to our toshiba p-25 laptop,
I have read on panasonic site that most of the spec. are the same (the 840,841 are tray loading and the 846-b is slot loading)
the 840 can write duel layer only with R+ media and the 2 others can do both R+,R- ,
it says that the uj 846-b have 2 mb buffer memory and something about "buffer under run protection",and it says nothing on this subject about the 840,841 memory buffers ,can it be they dont have at all?
and how significant are each of those factors on the practical use ?
Can someone help us please with this info?